If you have been using SCCM 2007 and now SCCM 2012 for a while you may see that your deployment time has increased, if you used the “Access content directly from distribution point option” in SCCM 2007.
Microsoft introduced the new content library, the idea is to save space by saving all files in a library but only save identical files once, and refer to the location for all other instances of the file. The idea is good, but it comes with a price. All content stored in the library must be extracted during installation. This slows down the deployment meaning all files will have to be downloaded by the client.
If you want to change this and store your content in a share, you can. Please be aware that this has a cost in disk space.
On all your content in the task sequence meaning packages, boot, images, drivers even the configuration manager agent, select “copy the content in this package to a package share on distribution points.”
After doing this you will be able to select “access content directly from..” on your deployments.
This limits you to use the old package model. So you have to decide what’s most important to you. A workaround could be to use the MDT integration for installing apps. Then you will have the best from both worlds.